<template>
  <div>
    <el-switch
  v-model="draggable"
  active-text="开启拖拽"
  inactive-text="关闭拖拽">
</el-switch>
<el-button @click="batchSave">
  批量保存
</el-button>
<el-button type="danger" @click="batchDelete">批量删除</el-button>
    <el-tree
      :data="menus"
      :props="defaultProps"
      :expand-on-click-node="false"
      show-checkbox
      node-key="catId"
      :draggable="draggable"
      :allow-drop="allowDrop"
      :default-expanded-keys="expandedkeys"
      @node-drop="handleDrop"
      ref="menuTree"
    >
      <span class="custom-tree-node" slot-scope="{ node, data }">
        <span>{{ node.label }}</span>
        <span>
          <el-button
            v-if="node.level <= 2"
            type="text"
            size="mini"
            @click="() => append(data)"
          >
            Append
          </el-button>

          <el-button type="text" size="mini" @click="() => edit(data)">
            Edit
          </el-button>

          <el-button
            v-if="node.childNodes == 0"
            type="text"
            size="mini"
            @click="() => remove(node, data)"
          >
            Delete
          </el-button>
        </span>
      </span>
    </el-tree>

    <el-dialog
      :title="title"
      :visible.sync="dialogVisible"
      width="30%"
      :close-on-click-modal="false"
    >
      <el-form :model="category">
        <el-form-item label="分类名称" :label-width="formLabelWidth">
          <el-input v-model="category.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标" :label-width="formLabelWidth">
          <el-input v-model="category.icon" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="计量单位" :label-width="formLabelWidth">
          <el-input
            v-model="category.productUnit"
            autocomplete="off"
          ></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="submitData">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {

      pCid:[],

      draggable:false,
      updateNodes: [],

      maxLevel: "",
      title: "",
      dialogType: "",
      category: {
        name: "",
        parentCid: 0,
        catLevel: 0,
        showStatus: 1,
        productUnit: "",
        icon: "",
        sort: 0,
      },
      dialogVisible: false,
      expandedkeys: [],
      menus: [],
      defaultProps: {
        children: "children",
        label: "name",
      },
      formLabelWidth: "120px",
    };
  },
  methods: {
    batchDelete(){
      let catIds = []
      let checkedNodes = this.$refs.menuTree.getCheckedNodes()
      console.log("被选中的节点：",checkedNodes)
 
      for(let i=0;i<checkedNodes.length;i++){
        catIds.push(checkedNodes[i].catId)

      }

      this.$confirm(`是否批量删除【${catIds}】菜单`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http({
            url: this.$http.adornUrl("/product/category/delete"),
            method: "post",
            data: this.$http.adornData(catIds, false),
          }).then(() => {
            this.$message({
              type: "success",
              message: "菜单删除成功!",
            });
            this.getMenus();
            //设置需要默认展开的菜单
            console.log(node);

          });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });

    



    },
    batchSave(){
      this.$http({
        url: this.$http.adornUrl("/product/category/update/sort"),
        method: "post",
        data: this.$http.adornData(this.updateNodes, false),
      }).then(({ data }) => {
        this.$message({
          message: "菜单顺序修改成功！",
          type: "success",
        });
      });
      //修改成功，刷新菜单
      //刷新菜单
      this.getMenus();
      //设置需要默认打开的菜单
      this.expandedkeys = [pCid];
      this.updateNodes = []
      this.maxLevel = ""
      this.pCid = 0

    },
    submitData() {
      if (this.dialogType == "add") {
        this.addCategory();
      }
      if (this.dialogType == "edit") {
        this.editCategory();
      }
    },
    //添加三级分类的方法
    addCategory() {
      this.title = "添加分类";
      console.log("提交的三级分类数据", this.category);
      this.$http({
        url: this.$http.adornUrl("/product/category/save"),
        method: "post",
        data: this.$http.adornData(this.category, false),
      }).then(({ data }) => {
        this.$message({
          message: "菜单增加成功！",
          type: "success",
        });
        //关闭对话框
        this.dialogVisible = false;
        //刷新菜单
        this.getMenus();
        //设置需要默认打开的菜单
        this.expandedkeys = [this.category.parentCid];
      });
    },
    handleNodeClick(data) {
      console.log(data);
    },
    getMenus() {
      console.log("开始获取数据....");
      this.$http({
        url: this.$http.adornUrl("/product/category/list/tree"),
        method: "get",
        params: this.$http.adornParams({}),
      }).then(({ data }) => {
        this.menus = data.page;
        console.log("数据获取成功！", data);
      });
    },
    append(data) {
      this.dialogType = "add";
      this.dialogVisible = true;
      this.category.parentCid = data.catId;
      this.category.catLevel = data.catLevel * 1 + 1;

      this.category.name = "";
      this.category.catId = null;
      this.category.icon = "";
      this.category.productUnit = "";
    },

    remove(node, data) {
      this.$confirm(`是否删除【${data.name}】菜单`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http({
            url: this.$http.adornUrl("/product/category/delete"),
            method: "post",
            data: this.$http.adornData(ids, false),
          }).then(() => {
            this.$message({
              type: "success",
              message: "菜单删除成功!",
            });
            this.getMenus();
            //设置需要默认展开的菜单
            console.log(node);
            this.expandedkeys = [node.parent.data.catId];
          });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });
      var ids = [data.catId];
      this.$http({
        url: this.$http.adornUrl("/product/category/delete"),
        method: "post",
        data: this.$http.adornData(ids, false),
      }).then((data) => {
        console.log("刪除菜單成功！", ids);
        this.getMenus();
      });
    },

    edit(data) {
      this.title = "修改分类";

      this.dialogType = "edit";

      this.dialogVisible = true;

      //发送请求，获取当前节点最新的数据

      this.$http({
        url: this.$http.adornUrl(`/product/category/info/${data.catId}`),
        method: "get",
        params: this.$http.adornParams({}),
      }).then(({ data }) => {
        console.log("请求到的数据是：", data);
        this.category.name = data.data.name;
        this.category.catId = data.data.catId;
        this.category.icon = data.data.icon;
        this.category.productUnit = data.data.productUnit;
        this.category.parentCid = data.data.parentCid;
      });

      console.log("要修改的数据：", data);
    },

    editCategory(data) {
      var { catId, name, icon, productUnit } = this.category;

      this.$http({
        url: this.$http.adornUrl("/product/category/update"),
        method: "post",
        data: this.$http.adornData({ catId, name, icon, productUnit }, false),
      }).then(({ data }) => {
        //关闭对话框
        this.dialogVisible = false;
        //刷新菜单
        this.getMenus();
        //设置需要默认打开的菜单
        this.expandedkeys = [this.category.parentCid];
      });
    },
    allowDrop(draggingNode, dropNode, type) {
      //1.被拖动的当前节点及所在的父节点层数不能大于3
      console.log(draggingNode, dropNode, type);

      //2.被拖动当前节点的总层数

      this.countNodeLevel(draggingNode.data);

      //当前正在拖动的节点+父节点所在的深度不大于3即可
      let deep = Math.abs(this.maxLevel - draggingNode.level) + 1;

      if (type == "Inner") {
        return deep + dropNode.level <= 3;
      } else {
        return deep + dropNode.parent.level <= 3;
      }
    },

    countNodeLevel(node) {
      //找到所有子节点，求出最大深度
      if (node.childNodes != null && node.childNodes.length > 0) {
        for (let i = 0; i < node.children[1].catLevel; i++) {
          if (node.childNodes[i].catLevel > this.maxLevel) {
            this.maxLevel = node.childNodes[1].catLevel;
          }

          this.countNodeLevel(node.childNodes[i]);
        }
      }
    },

    handleDrop(draggingNode, dropNode, dropType, ev) {
      //1.当前节点最新的父节点id
      let pCid = 0;
      let sibling = null;

      if (dropType == "before" || dropType == "after") {
        pCid =
          dropNode.parent.data.catId == undefined
            ? 0
            : dropNode.parent.data.catId;

        sibling = dropNode.parent.childNodes;
      } else {
        pCid = dropNode.data.catId;
        sibling = dropNode.childNodes;
      }
        this.pCid.push(pCid)
      //2.当前拖拽栉听最新顺序
      for (let i = 0; i < sibling.length; i++) {
        if (sibling[i].data.catId == draggingNode.data.catId) {
          //如果遍历的是当前拖拽的节点
          let catLevel = draggingNode.level;
          if (sibling[i].level != draggingNode.level) {
            //当前节点的层级发生变化
            catLevel = sibling[i].level;
            //修改子节点的层级
            this.updateChildNodeLevel(sibling[i]);
          }

          this.updateNodes.push({
            catId: sibling[i].data.catId,
            sort: i,
            parentCid: pCid,
            catLevel: catLevel,
          });
        } else {
          this.updateNodes.push({ catId: sibling[i].data.catId, sort: i });
        }
      }

      console.log("updateNodes:", this.updateNodes);

    },
    updateChildNodeLevel(node) {
      if (node.childNodes.length > 0) {
        for (let i = 0; i < node.childNodes.length; i++) {
          var cNode = node.childNodes[i].data;
          this.updateNodes.push({
            catId: cNode.catId,
            catLevel: node.childNodes[i].level,
          });
          this.updateChildNodeLevel(node.childNodes[i]);
        }
      }
    },
  },
  created() {
    this.getMenus();
  },
};
</script>

<style>
</style>